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powerpc: Make load_up_fpu and load_up_altivec callable 

Make load_up_fpu and load_up_altivec callable so they can be reused by
the VSX code.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Neuling 2008-06-25 14:07:18 +10:00 committed by Paul Mackerras
parent 10e343925a
commit 6f3d8e6947
4 changed files with 16 additions and 8 deletions
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2
arch/powerpc/kernel/fpu.S
View File

@ -85,7 +85,7 @@ _GLOBAL(load_up_fpu)
#endif /* CONFIG_SMP */
/* restore registers and return */
/* we haven't used ctr or xer or lr */
b fast_exception_return
blr
/*
* giveup_fpu(tsk)

6
arch/powerpc/kernel/head_32.S
View File

@ -421,8 +421,10 @@ BEGIN_FTR_SECTION
b ProgramCheck
END_FTR_SECTION_IFSET(CPU_FTR_FPU_UNAVAILABLE)
EXCEPTION_PROLOG
bne load_up_fpu /* if from user, just load it up */
addi r3,r1,STACK_FRAME_OVERHEAD
beq 1f
bl load_up_fpu /* if from user, just load it up */
b fast_exception_return
1: addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
/* Decrementer */

10
arch/powerpc/kernel/head_64.S
View File

@ -741,7 +741,8 @@ fp_unavailable_common:
ENABLE_INTS
bl .kernel_fp_unavailable_exception
BUG_OPCODE
1: b .load_up_fpu
1: bl .load_up_fpu
b fast_exception_return
.align 7
.globl altivec_unavailable_common
@ -749,7 +750,10 @@ altivec_unavailable_common:
EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN)
#ifdef CONFIG_ALTIVEC
BEGIN_FTR_SECTION
bne .load_up_altivec /* if from user, just load it up */
beq 1f
bl .load_up_altivec
b fast_exception_return
1:
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif
bl .save_nvgprs
@ -829,7 +833,7 @@ _STATIC(load_up_altivec)
std r4,0(r3)
#endif /* CONFIG_SMP */
/* restore registers and return */
b fast_exception_return
blr
#endif /* CONFIG_ALTIVEC */
/*

6
arch/powerpc/kernel/head_booke.h
View File

@ -376,8 +376,10 @@ label:
#define FP_UNAVAILABLE_EXCEPTION \
START_EXCEPTION(FloatingPointUnavailable) \
NORMAL_EXCEPTION_PROLOG; \
bne load_up_fpu; /* if from user, just load it up */ \
addi r3,r1,STACK_FRAME_OVERHEAD; \
beq 1f; \
bl load_up_fpu; /* if from user, just load it up */ \
b fast_exception_return; \
1: addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
#ifndef __ASSEMBLY__